How do I get the .xcdatamodel as a compiled resource into my pod?

TwelveTwentyToolkit.podspec

Pod::Spec.new do |s|
  s.name         = 'TwelveTwentyToolkit'
  s.version      = '0.0.1'
  s.summary      = 'The Twelve Twenty Toolkit of reusable Objective-C classes.'
  s.homepage     = 'http://twelvetwenty.nl'
  s.license      = 'MIT'
  s.author       = { 'Eric-Paul Lecluse' => 'epologee@gmail.com', 'Jankees van Woezik' => 'jankeesvw@gmail.com' }
  s.source       = { :git => 'https://github.com/TwelveTwenty/TwelveTwentyToolkit-ObjC.git', :commit => :head }
  s.platform     = :ios, '5.0'
  s.source_files = 'TwelveTwentyToolkit/TwelveTwentyToolkit.h'
  s.requires_arc = true
  s.preferred_dependency = 'CoreGraphics'

  s.subspec 'CoreGraphics' do |cg|
    cg.frameworks = 'UIKit','QuartzCore'
	cg.source_files = 'TwelveTwentyToolkit/CoreGraphics/*'
  end
  
  s.subspec 'CoreData' do |cd|
    cd.frameworks = 'CoreData'
	cd.source_files = 'TwelveTwentyToolkit/CoreData/*'
  end
  
  s.subspec 'AddressBook' do |uab|
    uab.frameworks = 'AddressBook'
    uab.dependency 'TwelveTwentyToolkit/CoreData'
    uab.source_files = 'TwelveTwentyToolkit/AddressBook','TwelveTwentyToolkit/AddressBook/Entities','TwelveTwentyToolkit/AddressBook/Entities/Abstract'
    uab.preserve_path = 'TwelveTwentyToolkit/AddressBook/TTUnifiedAddressBook.xcdatamodeld'

    def uab.post_install(target_installer)
      momd_relative = 'TwelveTwentyToolkit/AddressBook/TTUnifiedAddressBook.momd'
      momd_full = config.project_pods_root + momd_relative
      unless momd_full.exist?
        puts "\nCompiling TwelveTwentyToolkit/AddressBook Core Data model\n".yellow if config.verbose?
        model = config.project_pods_root + 'TwelveTwentyToolkit/AddressBook/TTUnifiedAddressBook.xcdatamodeld'
        command = "xcrun momc '#{model}' '#{momd_full}'"
        command << " 2>&1 > /dev/null" unless config.verbose?
        unless system(command)
          raise ::Pod::Informative, "Failed to compile TwelveTwentyToolkit/AddressBook Core Data model"
        end
      end

      File.open(File.join(config.project_pods_root, target_installer.target_definition.copy_resources_script_name), 'a') do |file|
        file.puts "install_resource '#{momd_relative}'"
      end
    end
  end
end

Take a look at the following:

CocoaPods/Xcodeproj#81 (comment)
https://github.com/Ashton-W/CoreDataPodSample